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研究论文

分散剂PVA对水热反应制备LiFePO_4性能的影响

  • 李会林 ,
  • 詹晖
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  • 武汉大学化学与分子科学学院,武汉大学化学与分子科学学院,武汉大学化学与分子科学学院 湖北武汉430072,湖北武汉430072,湖北武汉430072

收稿日期: 2006-08-28

  修回日期: 2006-08-28

  网络出版日期: 2006-08-28

The Influence of PVA as Disperser on LiFePO_(4) Synthesized by Hydrothermal Reaction

  • LI Hui-lin ,
  • ZHAN Hui~
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  • (*),ZHOU Yu-hong (College of Chemistry and Molecular Sciences,Wuhan University,Wuhan 430072,Hubei,China

Received date: 2006-08-28

  Revised date: 2006-08-28

  Online published: 2006-08-28

摘要

应用改进的水热反应法制得粒径小且分布均匀的L iFePO4颗粒,煅烧时加葡萄糖形成包覆碳.XRD、SEM和充放电测试表明,该材料粒径约200 nm,颗粒的尺寸分布比较均匀,具有3.45 V的放电平台,放电容量最高达到140 mAh/g,循环到第40周容量仅衰减2.1%.详细讨论了如何有效调控L iFePO4的粒子尺寸以及包覆碳对其电化学性能的影响.

本文引用格式

李会林 , 詹晖 . 分散剂PVA对水热反应制备LiFePO_4性能的影响[J]. 电化学, 2006 , 12(3) : 262 -265 . DOI: 10.61558/2993-074X.1733

Abstract

LiFePO_(4) was synthesized by means of hydrothermal reaction,in which PVA acts as disperser and glucose as carbon source.The samples were characterized by X-ray diffraction,scanning electron microscopy and electrochemical measurement.SEM results show that the sample is homogeneously composed of grains with a particle size of ca.200nm.In the charge/discharge test,the products exhibited a 3.45V discharge voltage plateau and a maximum specific capacity of 140mAh/g.After 40 cycles,its capacity only declined by 2.1%.Besides these,the mechanism for the influence of the particle size and carbon coating on the electrochemical property of LiFePO_(4)material was discussed in detail.

参考文献

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